Internal-combustion engine



H.GLuMERa INTERNAL COMBUSTION ENGINE.

APPLICATION FILED DEC. I3, 1918.

1,368,88 l Patented Feb. 15, 1921.

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,ai ATTURNEYJ are uw -re WAY Ts i wel 'ses 'rt' te INTERNAL-COMBUSTINENGINE.

Application filed December 113, 1918.

To at?? cl2/tom t may concern Be it known that l, HAMTLTON G. BLUM-nnne, of San Antonio, in the county of Bexar and State of Texas, haveinvented certain new and useful improvements in Internal- ComloustionEngines; and I do hereby declare the following to be a full, clear, andexact description. of the invention, Vsuch as will enable others skilledin the art to which it appertains to make and use the same.

My inventionrelates to internal combustion engines and particularly tovalve mechanism for controlling the inlet of the gaseous fuel and theexhaust of the hurnt gases, and the object of the invention is toprovide an improved and simple arrangement of valves in compact form andin such manner aste eliminate the dead air spacecoinmonly present invalve casings of internal combustion engines, as well as to provideimproved mechanism for operating the valves. The subject matter is animprovement uponcthe valve 'mechanism shown, described and claimed inLetters Patent No. 1,304,735 issued te me May 27, 1919. l

rilhe invention ,includes a main valve for controlling communication toand from the combustion chamber and valves governing' the ports ofentrance of the gaseous fuel and the exhaust of the burnt charge? theselatter valves being of the slide type; and so ranged inthe valve casingas to eliminate dead space, thereby effectinga saving in gas, sincethere vis no pocleting of the latter between the inlet valve and themain valve when the latter'closes for the compression and explosion andwhich gas would co-min- ;le with the exhaust gases and be forced outtherewith on the exhaust stroke of the piston. For the purpose ofinsuring" exact timed action of these three valves I have provided asingle cam the eccentrics of which are so arranged as to simultaneouslyeifect the opening of the main valve and the exhaust wilveq theeccentric governing' the lat-V lter permittingI 1t to close while themain valve is held open, and the eccentric of the cam governing theinlet valve causes it to open while the main valve is still held open,hoth these valves, the main and the inlet simultaneously closing, allthree valves being: held closed during the compression and explosionstrokes of the piston.

ln the accompanyingv drawings, Figure 1 is a vertical sectional view ofa cylinder head Speciication of Letters Patent.

lfttl'tetllifl). lli-55, 192i, Serial No. 266,563.

equipped with my improved valves, showing the position of the latter onthe intake stroke of the piston. Fig. 2 is a vertical sectional view online 2 2, Fig. l, looking in the direction of the arrows. Figs. 3 and eare detailed views of the actuating cani.

Referring to the drawings, 1 designates a. cylinder head having acentrally disposed port 2 terminating` in branched inlet and outletpassages, 3, el, respectively, the centrally disposed port 2 beingcontrolled by a main valve 5 of puppet form, the stem of the valvepassingf through an upwardly extending portion 6 of the head, whereappropriate connection is made with an actuatingr arm el for moving thevalve against the ten-y sion of a coiled spring '7 seated against thetop of the casing and a washer'or head 8 on the stem. Y

The inlet manifold 12 and the exhaust manifold 13 are located onopposite sides of the upwardly extended portion 6 of the cylinder headand a port 11i of the former and port 15 of the latter are controlled hyslide valves 16, 17, respectively. These valves are fitted withinrecesses in the manifold casing` immediately adjacent the portion 6 ofthe head,'being iirrnlv seated against the wall of the manifold.

Each valve has an upwardly extending stem 18 projecting through themanifold casing and provided at its outer end with a washer or head 19between which and the manifold casing is a cciled spring` 20 whichnormally tends to hold the valve elevated and in position to close theport, of its respective manifold. These valves are moved against thetension of their springs hy arms B and C, the arm B engaging the stem ofthe valve 16 and the arm C that of the valve 1T. These' two arms and thearm A connected with the stem of the main valve are actuated by a. cammechanism to be hereinafter described. In order to insure a closeContact of the valves 16 and 17 with their respective seats, l providepairs of pins 25, 26, preferably of bronze, which are slidahly fittedwithin transverse bores in the portion 6 of the head, the outer ends ofone pair bearing against the valve l'and those of the other against thevalve 17. The inner ends of these pins are beveled and those ofcomplementary pairs are contiguous. Short vertically disposed rods 27have their lower ends pointed and, under the control tion 6 of the headand held in such recesses by plates 29 secured to the head, are adaptedfio Vso

to engage the beveled ends of the pins 25,

26 to at all timesforce the pins outwardly.

Any preferred form of cam mechanism may be employed to actuate thevalves hereinbefore described which will insure the Vsimultaneousopening movement of the exhau'st and main valves, the continuance ofVthe open position of the main valve while Y the exhaust valve is beingclosed and while the inlet valve is opening and a ciosing ofV the mainvalve simultaneously with the closing of the inlet valve. A preferredembodiment of such mechanism is illustrated in thel drawings andincludes a single cam having` its three eccentricsin dierent verticalplanes as well as on different radii. Y The eccentric 30 engages theL-shaped rod 31 to which Vis secured the arm B which 'actuates the inletvalve 16. The eccentric 32 engages asimilarv -shaped rod 33 secured tothe.

arm @which is in engagement with the stem ofthe valve. 17V. Eccentric311: is adapted to move the L-shaped rod 35 Whose arm A actuates themain valve 5. it will be observed that vthe formation of theseeccentrics and the location with respect to each other is 'such thatwhen the eccentric 32 starts to act on the rod 38 lthe eccentric 34ewill also beginto act on the rod 35 so that both the exhaust valve 17and the main valve 5 will simultaneously open to permit exhaust ofanyproducts in the combustion chamber. rihe circumferential area of theeccentric 34 being greater than that of eccentric132 it will hold therod 35 down while the valve 17 is closing andwill hold this rod down andthe valve 5 open until the eccentric 30 has moved the rod 31 downwardlyand fully opened the'inlet valve 16 after which both the main valve 5andthe inlet valve 16 will close together, all valves remaining inclosed position during the compression and expansion strokes of thepiston.

I claim as my invention:

1. In an internal combustion engine, a

cylinder having an explosionv chamber at 'one end, and a single portforming Ythe inlet and exhaustfor said chamber, a main valve controllingsaid port, inlet and ex haust manifolds communicating with said port,said manifolds having each a valve seat in )uxtaposition to said pointsof communication with said port,` slide valves adapted to close saidpoints of communication, `pairs of pins bearing against said valves tohold them to their seats, spring actuatedrods for controlling thetension of said manifolds having each-'a valve seat in juxtaposition toSaid pointsV of communication with said port, slide valves adapted toclose said pointsl of communication, pairs of pins Vbearing against saidvalves to hold them to theirl seats', said pins having beveledextremities, spring actuated v,rods having pointedV ends bearing uponVsaid beveled extremities to hold said pins with relation to saidvalves, and cam mechanism for actuat-4 ing all of said valves to causesaid main valve and exhaust valve to ,simultaneously open, said exhaustvalve to close while said main valve is held` open, said inlet valve toopen while the main valveis open, and said main and inlet valves tosimultaneously close.` f

specification.` i

- HAMILTON G. BLUMBERG.

'In testimony whereof, Ii'have signedthis

